I got the mirena moved September 30 and had unprotected sex October 4th and a few more dates in October..I took a prego test and nothing came up. I have taken 4 all together and nothing has showed up. I was spotting on Nov. 1st but it was a brown color and it only lasted that one day. I feel nausea all day long and have thrown up a few times because of certain smells. I am hungry all the time and have been getting bad headaches.could I be pregnant? Am I taking the test too soon?? Please help!